<template>
  <div class="upload-container">
    <el-button :style="{background:color,borderColor:color}" icon="el-icon-upload" size="mini" type="primary" @click=" dialogVisible=true">
      <!-- upload-->
      上传
    </el-button>
    <el-dialog :visible.sync="dialogVisible" :modal-append-to-body="true" :append-to-body="true">
      <el-upload
        :multiple="true"
        :file-list="fileList"
        :show-file-list="true"
        :on-remove="handleRemove"
        :on-success="handleSuccess"
        :before-upload="beforeUpload"
        class="editor-slide-upload"
        action="https://httpbin.org/post"
        list-type="picture-card"
      >
        <el-button size="small" type="primary">
          <!--Click upload-->
          图片上传
        </el-button>
      </el-upload>
      <el-button @click="dialogVisible = false">
        <!--Cancel-->
        取消
      </el-button>
      <el-button type="primary" @click="handleSubmit">
        <!-- Confirm-->
        确定
      </el-button>
    </el-dialog>
  </div>
</template>

<script>
    // import { getToken } from 'api/qiniu'

    export default {
        name: 'EditorSlideUpload',
        props: {
            color: {
                type: String,
                default: '#1890ff'
            }
        },
        data() {
            return {
                dialogVisible: false,
                listObj: {},
                fileList: []
            }
        },
        methods: {
            checkAllSuccess() {
                return Object.keys(this.listObj).every(item => this.listObj[item].hasSuccess)
            },
            handleSubmit() {
                const arr = Object.keys(this.listObj).map(v => this.listObj[v]);
                if (!this.checkAllSuccess()) {
                    this.$message('请等待所有图像成功上传。如果出现网络问题，请刷新页面并重新上传!');
                    return
                }
                this.$emit('successCBK', arr);
                this.listObj = {};
                this.fileList = [];
                this.dialogVisible = false
            },
            handleSuccess(response, file) {
                const uid = file.uid;
                const objKeyArr = Object.keys(this.listObj);
                for (let i = 0, len = objKeyArr.length; i < len; i++) {
                    if (this.listObj[objKeyArr[i]].uid === uid) {
                        this.listObj[objKeyArr[i]].url = response.files.file;
                        this.listObj[objKeyArr[i]].hasSuccess = true;
                        return
                    }
                }
            },
            handleRemove(file) {
                const uid = file.uid;
                const objKeyArr = Object.keys(this.listObj);
                for (let i = 0, len = objKeyArr.length; i < len; i++) {
                    if (this.listObj[objKeyArr[i]].uid === uid) {
                        delete this.listObj[objKeyArr[i]];
                        return
                    }
                }
            },
            beforeUpload(file) {
                const _self = this;
                const _URL = window.URL || window.webkitURL;
                const fileName = file.uid;
                this.listObj[fileName] = {};
                return new Promise((resolve, reject) => {
                    const img = new Image();
                    img.src = _URL.createObjectURL(file);
                    img.onload = function() {
                        _self.listObj[fileName] = { hasSuccess: false, uid: file.uid, width: this.width, height: this.height }
                    };
                    resolve(true)
                })
            }
        }
    }
</script>

<style lang="scss" scoped>
  .editor-slide-upload {
    margin-bottom: 20px;
    ::v-deep .el-upload--picture-card {
      width: 100%;
    }
  }
</style>
